220131749125 has 8 divisors (see below), whose sum is σ = 274724423064. Its totient is φ = 176105399200.

The previous prime is 220131749111. The next prime is 220131749143. The reversal of 220131749125 is 521947131022.

It is a Cunningham number, because it is equal to 469182²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 220131749124 = 1^2 + 469182^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220131749125 is a prime.

It is a super-3 number, since 3×220131749125³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880526872 + ... + 880527121.

It is an arithmetic number, because the mean of its divisors is an integer number (34340552883).

Almost surely, 2^220131749125 is an apocalyptic number.

220131749125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220131749125 is a deficient number, since it is larger than the sum of its proper divisors (54592673939).

220131749125 is an equidigital number, since it uses as much as digits as its factorization.

220131749125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761054008 (or 1761053998 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 220131749125 in words is "two hundred twenty billion, one hundred thirty-one million, seven hundred forty-nine thousand, one hundred twenty-five".